package com.kingjw.lease.web.admin.service.impl;

import com.kingjw.lease.common.minio.MinioProperties;
import com.kingjw.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioProperties properties;

    @Autowired
    private MinioClient client;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        boolean bucketExists = client.bucketExists(BucketExistsArgs.builder().bucket(properties.getBucketName()).build());
        if (!bucketExists) {
            client.makeBucket(MakeBucketArgs.builder().bucket(properties.getBucketName()).build());
            client.setBucketPolicy(SetBucketPolicyArgs.builder().bucket(properties.getBucketName()).config(createBucketPolicyConfig(properties.getBucketName())).build());
        }

        String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) + "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
        client.putObject(PutObjectArgs.builder().
                bucket(properties.getBucketName()).
                object(filename).
                stream(file.getInputStream(), file.getSize(), -1).
                contentType(file.getContentType()).build());

        // 将后面的字符串都按"/" 字符进行拼接
        return String.join("/", properties.getEndpoint(), properties.getBucketName(), filename);
    }

    /**
     * 所有的用户对于桶bucketName 都有读权限
     * @param bucketName 桶名称
     * @return 桶的权限定义
     */
    private String createBucketPolicyConfig(String bucketName) {

        return "            {\n" +
                "              \"Statement\" : [ {\n" +
                "                \"Action\" : \"s3:GetObject\",\n" +
                "                \"Effect\" : \"Allow\",\n" +
                "                \"Principal\" : \"*\",\n" +
                "                \"Resource\" : \"arn:aws:s3:::"+bucketName+"/*\"\n" +
                "              } ],\n" +
                "              \"Version\" : \"2012-10-17\"\n" +
                "            }";
//        return """
//            {
//              "Statement" : [ {
//                "Action" : "s3:GetObject",
//                "Effect" : "Allow",
//                "Principal" : "*",
//                "Resource" : "arn:aws:s3:::%s/*"
//              } ],
//              "Version" : "2012-10-17"
//            }
//            """.formatted(bucketName);
    }
}
